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A Time-Variant Processing Approach for the Analysis of Alpha and Gamma MEG Oscillations During Flicker Stimulus Generated Entrainment

M. Wacker, M. Galicki, P. Putsche, T. Milde, K. Schwab, J. Haueisen, C. Ligges, H. Witte
2011 IEEE Transactions on Biomedical Engineering  
With flicker frequencies in the region of the individual alpha band frequency, the dynamics of the entrainment process of the alpha oscillation, as well as the dynamics of the accompanying gamma oscillations  ...  and the coupling between the oscillations, are investigated by means of an appropriate combination of time-variant analysis methods.  ...  The properties of MEG and EEG alpha oscillations (αOs) during flicker stimulation were studied by means of spectral analysis methods where it has been found that the entrainment effect of the alpha frequency  ... 
doi:10.1109/tbme.2011.2160640 pmid:21712153 fatcat:at7kbdf64bdebpksc2mxxhpv7u

Time-frequency Techniques in Biomedical Signal Analysis

M. Wacker, H. Witte
2013 Methods of Information in Medicine  
Acknowledgment The study was supported by the DFG Wi 1166/9-2 "New methods and analysis strategies for the quantification of time-variant coupling and synchronization properties between oscillatory EEG  ...  /MEG activities".  ...  A phase-locking of the alpha rhythm occurs after the flicker onset and is maintained during the flicker, i.e. the alpha is entrained to the flicker frequency.  ... 
doi:10.3414/me12-01-0083 pmid:23703538 fatcat:nw7jby6gnvbirco3uiaidd7heq

Impaired evoked and resting-state brain oscillations in patients with liver cirrhosis as revealed by magnetoencephalography

Theresa Götz, Ralph Huonker, Cornelia Kranczioch, Philipp Reuken, Otto W. Witte, Albrecht Günther, Stefan Debener
2013 NeuroImage: Clinical  
Magnetoencephalography (MEG) data were collected at rest and during a visual task employing repetitive stimulation. Resting MEG and evoked fields were analyzed.  ...  A number of studies suggest that the clinical manifestation of neurological deficits in hepatic encephalopathy results from pathologically synchronized neuronal oscillations and altered oscillatory coupling  ...  Acknowledgments This work has been supported by the German Federal Ministry of Education and Research. We would like to thank Tina Radtke for recording assistance. Appendix A.  ... 
doi:10.1016/j.nicl.2013.06.003 pmid:24179838 pmcid:PMC3777687 fatcat:ygzrftdninb6za63faat7fy4me

The role of alpha oscillations in temporal attention

Simon Hanslmayr, Joachim Gross, Wolfgang Klimesch, Kimron L. Shapiro
2011 Brain Research Reviews  
The present article reviews recent findings on the role of prestimulus alpha oscillatory activity for visual perception and incorporates these results into a neurocognitive model that is able to account  ...  Keywords: Brain oscillation Attentional blink Alpha MEG EEG Resting state ⁎  ...  Acknowledgments The authors would like to thank Nathan Weisz and Maria Wimber for their very insightful comments on previous  ... 
doi:10.1016/j.brainresrev.2011.04.002 pmid:21592583 fatcat:nvduoyp3qjaihm5q7tw3abelly

Modeling Brain Resonance Phenomena Using a Neural Mass Model

Andreas Spiegler, Thomas R. Knösche, Karin Schwab, Jens Haueisen, Fatihcan M. Atay, Olaf Sporns
2011 PLoS Computational Biology  
We reproduced the entrainment phenomenon observed in EEG during a photic driving experiment.  ...  In this context, it can be used to study the mechanisms of, for example, perception and epileptic seizure generation.  ...  Acknowledgments We would like to thank Henning Schwanbeck (Computer Center, Ilmenau University of Technology), who graciously provided timely computational support, and Stefan J.  ... 
doi:10.1371/journal.pcbi.1002298 pmid:22215992 pmcid:PMC3245303 fatcat:fpo63kf7jbb5hnbaxkgzzuk674

NONLINEAR DYNAMICSOF EVOKED NEUROMAGNETIC RESPONSES SIGNIFIES POTENTIAL DEFENSIVE MECHANISMS AGAINST PHOTOSENSITIVITY

JOYDEEP BHATTACHARYA, KATSUMI WATANABE, SHINSUKE SHIMOJO
2004 International Journal of Bifurcation and Chaos in Applied Sciences and Engineering  
We investigated the dynamical characteristics of neuromagnetic responses by recording magnetoencephalographic (MEG) signals to equi-luminant flickering stimulus of different color combinations from a group  ...  to chromatic flickering stimulus, and such nonlinear mechanism is likely to be impaired for patient with photosensitive epilepsy.  ...  This was primarily due to the entrainment of brain waves with alpha resonance-like phenomenon induced by the audio-visual stimulus.  ... 
doi:10.1142/s0218127404010850 fatcat:voktkltnvnbwpgh5yooemuy6dm

Surprise About Sensory Event Timing Drives Cortical Transients in the Beta Frequency Band [article]

Thomas Meindertsma, Niels A Kloosterman, Andreas K. Engel, Eric-Jan Wagenmakers, Tobias H. Donner
2018 biorxiv/medrxiv   pre-print
Here, we developed a computational model-based magnetoencephalography (MEG) approach for mapping the resulting cortical transients across space, time, and frequency, in the human brain (N=28, 17 female  ...  We used a Bayesian ideal observer model to learn the statistics of the timing of changes in a simple visual detection task.  ...  The time-variant prior fЈ tϩ1 converged to 1 as time passed, and thus surprise approached 0 for longer intervals.  ... 
doi:10.1101/254060 fatcat:4kwdg2xzeja5vmhspcdrmmpbv4

Surprise About Sensory Event Timing Drives Cortical Transients in the Beta Frequency Band

Thomas Meindertsma, Niels A. Kloosterman, Andreas K. Engel, Eric-Jan Wagenmakers, Tobias H. Donner
2018 Journal of Neuroscience  
Here, we developed a computational model-based magnetoencephalography (MEG) approach for mapping the resulting cortical transients across space, time, and frequency, in the human brain (N = 28, 17 female  ...  We used a Bayesian ideal observer model to learn the statistics of the timing of changes in a simple visual detection task.  ...  The time-variant prior fЈ tϩ1 converged to 1 as time passed, and thus surprise approached 0 for longer intervals.  ... 
doi:10.1523/jneurosci.0307-18.2018 pmid:30030396 pmcid:PMC6705972 fatcat:plniae3xszetjgjwmrfndv4aey

Synchronization Between Sources: Emerging Methods for Understanding Large-Scale Functional Networks in the Human Brain [chapter]

Sam M. Doesburg, Lawrence M. Ward
2009 Coordinated Activity in the Brain  
Second, we describe several useful techniques for obtaining phase information from time series of EEG and MEG records, and measuring phase locking or phase coherence using these methods.  ...  We also provide a few examples of published or forthcoming research that has used these approaches.  ...  Acknowledgments Preparation of this chapter was supported by a grant from the Natural Sciences and Engineering Research Council (NSERC) of Canada.  ... 
doi:10.1007/978-0-387-93797-7_2 fatcat:brmy7xa3xfdh3ekdgpdxy6duke

Estimating the transfer function from neuronal activity to BOLD using simultaneous EEG-fMRI

M.J. Rosa, J. Kilner, F. Blankenburg, O. Josephs, W. Penny
2010 NeuroImage  
for the integration of EEG and fMRI  ...  Understanding the nature of the link between neuronal activity and BOLD plays a crucial role in improving the interpretability of BOLD images, as well as on the design of more robust and realistic models  ...  As scalp EEG measures the activity of multiple distributed neuronal processes we used a PCA approach to isolate activity that was primarily related to the stimulus paradigm.  ... 
doi:10.1016/j.neuroimage.2009.09.011 pmid:19778619 pmcid:PMC2793371 fatcat:55tsbvvhrfcjtpmovosvqn4kxu

Gamma Band Neural Stimulation in Humans and the Promise of a New Modality to Prevent and Treat Alzheimer's Disease

Barry McDermott, Emily Porter, Diarmaid Hughes, Brian McGinley, Mark Lang, Martin O'Halloran, Marggie Jones, Amy Clements-Cortes
2018 Journal of Alzheimer's Disease  
The study proposed that 1446 the SSR, which are gamma band oscillation pat-1447 terns, and the response to a stimulus, are related to 1448 the processing and binding of a particular scene.  ...  the stimulus type and time latency compared 1113 to the gamma components.  ... 
doi:10.3233/jad-180391 pmid:30040729 fatcat:46xqbryalbbgporqog2xfvxyk4

Proceedings: ISBET 200 – 14th World Congress of the International Society for Brain Electromagnetic Topography, November 19-23, 2003

Yoshio Okada
2003 Brain Topography  
The BESA (Brain Electrical Source Analysis) program provides a large variety of tools for the complete analysis of EEG and MEG recordings.  ...  Time-frequency analysis revealed induced gamma-band synchronization in the visual cortical areas.  ...  Time-frequency analysis of MEG and EEG waveforms has become a method of increasing interest during the recent years, because it has been shown to reflect higher cognitive processing of sensory input, attention  ... 
doi:10.1023/b:brat.0000019284.29068.8d fatcat:tpvp3dcojrczjkuzcu3xefyizy

Exploring intermediate phenotypes with EEG: Working memory dysfunction in schizophrenia

Corinna Haenschel, David Linden
2011 Behavioural Brain Research  
Citation: Haenschel, C. and Linden, D. (2011). Exploring intermediate phenotypes with EEG: Working memory dysfunction in schizophrenia. This is the accepted version of the paper.  ...  This version of the publication may differ from the final published version. Permanent repository link: http://openaccess.city.ac.uk/12840/ Link to published version: http://dx.  ...  Acknowledgment CH was supported by the Wales Institute of Cognitive Neuroscience, funded by the Welsh Assembly Government. We would like to thank Dr. Andrew Parton for helpful discussions.  ... 
doi:10.1016/j.bbr.2010.08.045 pmid:20816898 fatcat:w4slzv7mxnamloxxpcupcsvpxe

Differential transient MEG and fMRI responses to visual stimulation onset rate

August S. Tuan, Rasmus M. Birn, Peter A. Bandettini, Geoffrey M. Boynton
2008 International journal of imaging systems and technology (Print)  
This divergence from linearity between the stimulus time-course and BOLD signal could be caused by neuronal onset and offset transients, rather than a nonlinearity in the hemodynamics related to BOLD contrast  ...  While recent analysis of functional magnetic resonance imaging (fMRI) data utilize a generalized nonlinear convolution model (e.g., dynamic causal modeling), most conventional analyses of local responses  ...  ACKNOWLEDGMENTS The authors thank Fred Carver and Tom Holroyd for their assistance in MEG data acquisition and analysis.  ... 
doi:10.1002/ima.20144 fatcat:hnguklcxvbheza7ey6uoj5epei

Causal role of beta oscillations in time estimation [article]

Martin Wiener, Alomi Parikh, Arielle Krakow, H Branch Coslett
2017 bioRxiv   pre-print
Our results provide causal evidence for the involvement of beta oscillations in the perception of time, and point to a specific role for beta oscillations in the encoding and retention of memory for temporal  ...  Here, we address these issues and demonstrate for the first time a causal connection between beta oscillations and timing.  ...  a decomposition of both accumulator and decision processes during timing  ... 
doi:10.1101/165233 fatcat:wdgxdsfwybbj7gjhoxavuzwexu
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